diff --git a/docs/userguide_2.0.md b/docs/userguide_2.0.md
index 22ac47765..7f2e979a3 100644
--- a/docs/userguide_2.0.md
+++ b/docs/userguide_2.0.md
@@ -178,7 +178,7 @@ Set `isolationLevel` to `NONE` to avoid large single transactions which might le
 | `spark.tispark.grpc.framesize`                  | `2147483647`     | The maximum frame size of gRPC response in bytes (default 2G)                                                                                                                                                                                                                                                                                                                                                                                       |
 | `spark.tispark.grpc.timeout_in_sec`             | `10`             | The gRPC timeout time in seconds                                                                                                                                                                                                                                                                                                                                                                                                                    |
 | `spark.tispark.plan.allow_agg_pushdown`         | `true`           | Whether aggregations are allowed to push down to TiKV (in case of busy TiKV nodes)                                                                                                                                                                                                                                                                                                                                                                  |
-| `spark.tispark.plan.allow_index_read`           | `true`           | Whether index is enabled in planning (which might cause heavy pressure on TiKV)                                                                                                                                                                                                                                                                                                                                                                     |
+| `spark.tispark.plan.allow_index_read`           | `true`           | Whether index is enabled in planning                                                                                                                                                                                                                                                                                                                                                                                    |
 | `spark.tispark.index.scan_batch_size`           | `20000`          | The number of row key in batch for the concurrent index scan                                                                                                                                                                                                                                                                                                                                                                                        |
 | `spark.tispark.index.scan_concurrency`          | `5`              | The maximal number of threads for index scan that retrieves row keys (shared among tasks inside each JVM)                                                                                                                                                                                                                                                                                                                                           |
 | `spark.tispark.table.scan_concurrency`          | `512`            | The maximal number of threads for table scan (shared among tasks inside each JVM)                                                                                                                                                                                                                                                                                                                                                                   |
diff --git a/docs/userguide_3.0.md b/docs/userguide_3.0.md
index ee1042c33..97f25bff8 100644
--- a/docs/userguide_3.0.md
+++ b/docs/userguide_3.0.md
@@ -237,7 +237,7 @@ spark.sql("select t1.id,t2.id from spark_catalog.default.t t1 left join tidb_cat
 | `spark.tispark.grpc.framesize`                  | `2147483647`     | The maximum frame size of gRPC response in bytes (default 2G)                                                                                                                                                                                                                                                                                                                                                                                       |
 | `spark.tispark.grpc.timeout_in_sec`             | `180`            | The gRPC timeout time in seconds                                                                                                                                                                                                                                                                                                                                                                                                                    |
 | `spark.tispark.plan.allow_agg_pushdown`         | `true`           | Whether aggregations are allowed to push down to TiKV (in case of busy TiKV nodes)                                                                                                                                                                                                                                                                                                                                                                  |
-| `spark.tispark.plan.allow_index_read`           | `true`           | Whether index is enabled in planning (which might cause heavy pressure on TiKV)                                                                                                                                                                                                                                                                                                                                                                     |
+| `spark.tispark.plan.allow_index_read`           | `true`           | Whether index is enabled in planning                                                                                                                                                                                                                                                                                                                                                                                    |
 | `spark.tispark.index.scan_batch_size`           | `20000`          | The number of row key in batch for the concurrent index scan                                                                                                                                                                                                                                                                                                                                                                                        |
 | `spark.tispark.index.scan_concurrency`          | `5`              | The maximal number of threads for index scan that retrieves row keys (shared among tasks inside each JVM)                                                                                                                                                                                                                                                                                                                                           |
 | `spark.tispark.table.scan_concurrency`          | `512`            | The maximal number of threads for table scan (shared among tasks inside each JVM)                                                                                                                                                                                                                                                                                                                                                                   |